Add ability to introspect whats going on

[whyrusleeping]

Reposting this issue here: filecoin-project/go-sectorbuilder#3

It would be nice to have some exposed apis that allow the user to query what the sectorbuilder is currently doing, like sealing N sectors in parallel, 65% complete, etc. Some sort of thing we could use to inspect why my cpu is melting.

I'm not exactly sure what i want from these apis, but i know we need something

[laser]

@whyrusleeping

It would be nice to have some exposed apis that allow the user to query what the sectorbuilder is currently doing, like sealing N sectors in parallel

Some version of what you ask for is possible with the existing API. Example: The following goroutine prints the sealing state for all staged sectors. If your sector builder is sealing 2 sectors in parallel, this will tell you as much:

go func() {
	for {
		allStagedSectors, err := sb.GetAllStagedSectors(ptr)
		if err != nil {
			panic(err)
		}

		for _, stagedSector := range allStagedSectors {
			status, err := sb.GetSectorSealingStatusByID(ptr, stagedSector.SectorID)
			if err != nil {
				panic(err)
			}

			fmt.Printf("sector id: %d, state: %s\n", stagedSector.SectorID, status.State)
		}

		time.Sleep(1 * time.Second)
	}
}()

This will tell you why your CPU is melting.

What other things would you like the sector builder to be able to tell you?